Cooper Bussmann
Read
and Retain
for Future
Reference
BU-905U-L Wireless I/O
Installation Manual
Version 1.6
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Safety Information
Thank you for selecting the BU-905U-L for your telemetry needs. We trust it will give you many years of valuable service. To ensure your
BU-905U-L enjoys a long life, double-check ALL your connections with the Installation Guide before powering on the module.
WARNING - Incorrect termination of supply wires may cause internal damage and will void warranty.
Exposure to RF energy is an important safety consideration. The FCC has adopted a safety standard for human exposure to radio frequency
electromagnetic energy emitted by FCC regulated equipment as a result of its actions in Docket 93-62 and OET Bulletin 65 Edition 97-01.
FCC Notice when used in USA: 905U Wireless I/O Module
Part
Additional information
15
This device has been tested and found to comply with the limits for a Class B digital device, pursuant
to Part15 of the FCC rules (Code of Federal Regulations 47CFR Part 15). Operation is subject to the
condition that this device does not cause harmful interference.
90
This device has been type accepted for operation by the FCC in accordance with Part90 of the
FCC rules (47CFR Part 90). See the label on the unit for the specific FCC ID and any other
certification designations.
Industry Canada: BU-905U-L Wireless I/O Module
RSS-119 - This device has been type accepted for operation by Industry Canada in accordance with RSS-119 of the Industry Canada rules. See
the label on the unit for the specific Industry Canada certification number and any other certification designations.
NOTE: Any changes or modifications not expressly approved by Cooper Bussmann P/L could void the user’s authority to operate this
equipment.
To operate this equipment legally the user must obtain a radio-operating license from the government agency. This is done so the government can
coordinate radio users in order to minimize interference.
Safety Information - FCC Notice
This device complies with Part 15.247 of the FCC Rules. Operation is subject to the following two conditions:
• This device may not cause harmful interference; and
• This device must accept any interference received, including interference that may cause undesired operation
NOTE: This equipment is suitable for use in Class 1 Division 2 groups A, B and C or non-hazardous locations only.
IMPORTANT ELECTRICAL SAFETY INFORMATION
In order to comply with Electrical Safety Regulations, this module must be installed in an Electrical AND Fire enclosure.
This enclosure may be a single or multiple enclosures. Access to the module is to be made by a Service Person only.
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About This Document
This document is the BU-905U-L Wireless I/O Installation Manual that describes how to install your BU-905U-L units and contains important
information for installing your units with other equipment.
NOTE: If your network only contains one transmitter and receiver pair, you should also read the BU-905U-L QuickStart Guides.
This document contains the following sections:
Section
Read this section if you want to
Basic steps for using your unit
Factory default configuration
Unit components
Learn the basic steps for installing and using your unit.
Understand how the transmitter sends information to the receiver.
Understand the different parts of your unit.
Antenna installation
Learn how to install an antenna with your unit.
Reset your unit to the original factory default settings.
Link your units to work as a dedicated pair.
Resetting factory defaults
Linking transmitter and receiver units
Safety information
Understand important safety information related to your unit.
NOTE: You must read this information before installing your unit.
Specifications
Know technical information about your unit.
For more information, see the next sections.
INSTALLING YOUR UNIT
This section describes how to install your unit and contains the following sections:
Step
Description
For more information, see …
1, Read the safety information
Lets you understand important safety information related to your
unit. NOTE: You must read this information before installing your unit.
Safety information on page 3.
2. Get to know the unit features Understand the basic features of your unit.
Unit components and
connections on page 5.
3. Install the antenna
Learn how to install an antenna with your unit.
Learn how to install a power supply for your unit.
Installing the antenna on page 9.
4. Install the power supply
Installing the power supply
on page 14.
5. Install the units
Learn how to install your unit.
Installing the unit on page 23.
6. Linking and configuring
the unit
Learn how to link and configure your units to transmit and
receive information.
Configuring your units
on page 24.
7. Test the unit
Understand the principles for testing your units.
Testing your units on page 25.
Note: To ensure internal surge protection works correctly, you must earth each unit using the Earth terminal.
For more information, see the next sections.
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Unit Components and Connections
This section shows the components and terminal connections for the transmitter and receiver units.
Transmitter Unit
The BU-905U-L-T transmitter unit has the following components and terminal connections:
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The front panel contains the following components:
SMA Antenna Connector at Top of Unit
Indicator LEDs
RS232 Configuration Port
Rotary Switch for Setpoint Settings
The triangle on the rotary switch indicates the current position, for example:
NOTE: To avoid damaging the rotary switch, use a screwdriver to change the position.
The rotary switch controls the setpoint levels on the Analog and Thermocouple inputs.
The LEDs on the front panel indicate the unit status:
LED Status
None
Indicates
No power supply.
OK LED Green
OK LED Red
TX Led Flashes
PG LED on
Current status of the unit OK.
Fault condition detected in unit.
Transmitting Message.
Configuration Cable Connected.
Input LEDS (i.e., D1, D2, SP, AZ.) light when the corresponding input is active.
Input LED ON
D1
D2
SP
AZ
Digital Input 1 is active (Low).
Digital Input 2 is active.
Analog Setpoint is active.
Analog Input is zero mA
All LEDs medium flash
Medium speed flash (1.6Hz) indicates the module is halfway through the configuration process.
Medium flash also happens when you set the rotary switch to position 0 when powering on the unit.
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Receiver Unit
Your BU-905U-L-R unit has the following components and terminal connections:
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The front panel contains the following components:
SMA Antenna Connector at Top of Unit
Indicator LEDs
RS232 Configuration Port
RSSI Push-Button
The LEDs on the front panel indicate the unit status:
LED Status
None
Indicates
No power supply.
OK LED Green
OK LED Red
RX Led Flashes
CF Led ON
Current status of the unit OK.
Fault condition detected in unit.
Receiving Message.
Module Communication Failure Output is active.
Configuration Cable Connected.
The Output LEDS (i.e., D1, D2, D3) light when the corresponding output is active.
PG LED on
Output LED ON
D1
D2
D3
Relay output D1 is ON (Contact Closed).
Relay Output D2 is ON.
Relay Output D3 is ON.
LEDs with RSSI Push
Button Pressed
When you press the RSSI push button, the unit shows the signal strength by lighting the
LEDs from the bottom to the top. Signal strength is the strength of the last message received
that was addressed to this station.
LED
D1
D2
D3
Signal Strength
LED
RX
Signal Strength
More than -85 dBm
More than -90 dBm
More than -95 dBm
More than -100 dBm
More than -105 dBm
Always on during RSSI test
CF
PG
Output LED flashing quickly
If an output is in communication failure, the corresponding LED flashes at 5 Hz.
D1
D2
D3
PG
Relay Output D1 is in communication failure.
Relay Output D2 is in communication failure.
Relay Output D3 is in communication failure.
Analog output is in communications failure.
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Installing the Antenna
This section explains how to install your antenna and contains the following sections:
Section Description
Supported antennas and cables Details the antennas and cables you can use with the units.
Radio transmission distances Details the distances for reliable operation.
For more information, see …
Supported antennas on page 9.
Radio transmission distances
on page 10.
Installing and earthing antennas Details important information about installing and earthing antennas. Installing and earthing antennas
on page 11
Omni-directional antennas
Details important information about using dipole and collinear
antennas.
Dipole and collinear antennas
on page 11.
Yagi directional antennas
Details important information about using Yagi antennas.
Yagi antennas on page 13.
For more information, see the next sections.
Supported Antennas
You can use the following antennas with the units:
Antenna
Additional information
Total gain (including cable)
BU-WH900-SMA
Whip antenna for mounting directly onto the module -
operation up to ½ mile (1 km).
-6 dBi
BU-CFD890EL
SG900EL
0 dBi Dipole antenna with 15’ of Cellfoil cable and SMA connector. 0 dBi
5dBi Collinear omni-directional antenna with N-type connector.
8dBi Collinear omni-directional antenna with N-type connector.
10dBi Yagi directional antenna with N-type connector.
15dBi Yagi directional antenna with N-type connector.
5 dBi
BU-SG900-6
BU-YU6-900
BU-YU16-900
8 dBi
10 dBi
15 dBi
You can use the following cables with the units:
The following table shows compatible cables for different antennas when used with the BU-905U-L-T:
Antenna
North America
Any cable.
Australia/NZ
BU-SG900EL
BU-SG900-6
BU-YU6-900
BU-YU16-900
CC10 or CC20.
Any cable.
CC20.
CC20.
External cable with loss > 9dB.
External cable with loss > 15 dB
External cable with loss > 9dB.
You must carefully select antennas for BU-905U-L-T modules to avoid contravening the maximum power limit on the unlicensed channel. The net
gain of the antenna/cable configuration should be no more than 6dB in North America (USA, Canada, Mexico) and no more than 0 dB in Australia /
New Zealand.
Note: The net gain of an antenna/cable configuration is the gain of the antenna (in dBi) less the loss in the coaxial cable (in dB).
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For example, an BU-SG900-6 antenna with a BU-CC20-SMA cable kit has a net gain of 2dB (i.e., +8 dB – 6 dB) at 900 MHz.
The BU-905U-L-R module has no limitation on antenna gain, as this module does not incorporate a radio transmitter.
The following table details the gains of some typical antennas:
Antenna
Gain (dBi)
Dipole with integral 3m cable
Dipole without cable
5dBi Collinear (3dBd)
8dBi Collinear (6dBd)
3 element Yagi
0
2
5
8
5
6 element Yagi
10
The following table details losses for typical cables:
Cable
RG58
Loss (dB per 10m) at 900 MHz
-5
RG213
Cellfoil
-2.5
-3
Radio Transmission Distances
The unit will operate reliably over large distances depending on the:
• Antenna type;
• Antenna location;
• Amount of radio interference; and
• Radio path obstructions (e.g., hills or trees).
Typical reliable distances are:
Area
Distance
20+ miles
20+ km
Additional information
USA/Canada
Australia/NZ
6dB net gain antenna configuration permitted (4W Equivalent RF power permitted).
Unity gain antenna configuration (1W Equivalent RF power permitted).
To achieve these distance, you must elevate at least one site on a hill or transmission tower.
Modules will operate reliably with some radio path obstruction; however obstructions also reduce the reliable distance.
Note: You must test all obstructed paths to check the reliability of the path.
You can achieve maximum transmission distances if the radio path has “line of sight.” For example, raising antennas above intermediate
obstructions including hills, trees, etc. Obstructions reduce the range; however they may not prevent a reliable path.
The closer the obstruction is to the antenna, the greater the blocking effect. For example, a group of trees around the antenna is a larger
obstruction than a group of trees further away from the antenna. You can achieve longer distances by mounting one antenna on top of a hill.
Note; Due to the earth’s curvature, you must elevate antennas higher than the ground level between the antennas for longer paths
(greater than 3 miles / 5 km).
The unit can tolerate larger amounts of obstructions for shorter distances. For very short distances, you can also mount the antennas inside
buildings.
If two BU-905U-L modules cannot communicate reliably, you can use a third 905U module as a “repeater” to receive and re-transmit messages.
This module may also have input/output (I/O) signals connected to it and form part of the I/O network.
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NOTE:
1. Cooper Bussmann recommends using the 905U-G module as a repeater unit between BU-905U-L-T and BU-905U-L-R modules.
2. To use a repeater unit, the BU-905U-L modules and the repeater module must be configured using the supplied configuration software. The
factory default configuration described in the Quick Start Guide cannot use a repeater unit.
Installing and Earthing Antennas
You must connect an antenna to each BU-905U-L module using the SMA connector at the top of the enclosure.
Cooper Bussmann recommends carefully taping the connections between the antenna and coaxial cable to prevent moisture ingress. Moisture
ingress in the coaxial cable is a common cause of radio system problem as it greatly increases the radio losses.
Cooper Bussmann recommends taping the connection with three layers of tape:
Layer
Tape
1
2
3
PVC tape.
Vulcanizing tape (e.g. 3M 23 tape).
Additional layer of PVC UV-stabilized insulating tape.
The first tape layer lets you easily inspect the joint if required as you can easily remove the Vulcanizing seal.
Note: You must effectively earth all masts for mast-mounted antennas to avoid lightning surges. We also recommend using a coaxial
surge diverter for antennas mounted outside industrial plant environments.
If the antenna is not already shielded from lightning strike by an adjacent earthed structure, you can provide shielding by installing a lightning rod
above the antenna.
You should connect the antenna to the module using 50 ohm coaxial cable (e.g. RG58 or RG213) terminated with a male coaxial connector, The
higher the antenna is mounted, the greater the transmission range; however as the length of coaxial cable increases so do cable losses. For use
on unlicensed frequency channels, there are several types of antenna suitable for use.
If you mount antennas on elevated masts, you should effectively earth the masts to avoid lightening surges. The BU-905U-L radios are fitted with
surge protection.
Note: For high lightening risk areas, Cooper Bussmann recommends additional surge suppression devices. If the antenna is not
already shielded from lightening strike by an adjacent earthed structure, you can install a lightening rod to provide shielding.
Omni-directional Antennas
This section contains important information for using dipole and collinear antennas. For more information, see the next sections.
Dipole Antennas
Unity gain dipole antennas are commonly used on unlicensed channels. The dipole antenna does not provide any gain, so the power transmitted
from the antenna is the same as the power out of the module.
A dipole antenna that comes supplied with integral 15 ft cable does not require additional coaxial cable.
You should mount dipole antennas vertically, preferably no less than 1 metre away from a wall or mast for maximum performance.
Collinear Antennas
Collinear antennas transmit the same amount of radio power in all directions horizontally, and are easy to install and use. They provide gain by
compressing the radiated signal to a flattened disc shape, and reducing the amount of signal radiated above and below the horizontal plane.
Collinear antennas are generally used at a central site with more than one remote site, or at a repeater site.
Collinear antennas are similar in appearance to dipole antennas; however the antenna is longer.
Collinear antennas are supplied without cable, and require additional coaxial cable.
You can use collinear antennas to:
• Transmitter – to compensate for the losses in long lengths of coaxial cable.
• Receiver – to increase receive sensitivity.
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The following diagrams shows the recommended installation for omni-directional antennas:
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Yagi Directional Antennas
Yagi antennas are directional and have positive gain to the front of the antenna and negative gain in other directions. You can use the gain to:
• Compensate for coaxial cable loss for transmitter unit; and
• Increase receive sensitivity for receiver units.
You should install Yagi antennas with the central beam horizontal and pointed directly in the transmission direction to benefit from the
antenna gain.
Note: Yagi antennas usually have a drain hole on the folded element. You should position the drain hole at the bottom when
installing the antenna.
You can install Yagi antennas:
• Vertically polarized – with the elements in a vertical plane; or
• Horizontally polarized – with the elements in a horizontal plane.
The following table shows the recommended installation mode for different situations.
If your installation has …
Cooper Bussmann recommends using …
Two stations both using Yagi antennas
• Horizontal polarization for the stations.
Two or more stations communicating
with a common station
• Vertical polarization for the stations; and
• Omni-directional (i.e., non-directional) antenna for the central station.
The following diagram shows the recommended installation for Yagi directional antennas.
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Installing the Power Supply
The unit works with a 9-30Vdc 0.6 Amp CSA certified Class 2 power supply. For use in Class 1 Div 2 hazardous locations, the power supply must
be approved for Class 1 Div 2 use.
Warning – Explosion Hazard
Do not disconnect while circuit is live unless area is known to be non-hazardous.
The following table shows the power supply requirements:
Power Supply
BU-905U-L-T
600mA
BU-905U-L-R
250mA
12V
24V
300mA
125mA
The power supply can be a floating supply or negatively grounded.
The transmitter provides a 24Vdc regulated supply for analog loop power. The supply is rated at 35mA and should ONLY be used for powering
analog loops.
To install the power supply:
1. Connect the positive lead to Power Supply Input.
2. Connect the negative lead to Ground.
Note: To ensure internal surge protection works correctly, you must earth each unit using the Earth terminal.
- You should connect the module to the same ground/earth point as the antenna mounting to avoid
differences in earth potential during voltage surges.
- Do NOT connect the positive side of the supply to Earth.
3. The following diagram illustrates the connection:
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INPUTS AND OUTPUTS
The units have the following inputs and outputs:
Input/Output
BU-905U-L-T BU-905U-L-R Description
For more information, see …
Digital inputs
2
Suitable for Voltage free contact,
Digital inputs on page 15.
NPN transistor, 0-5V signal.
Relay outputs
Status outputs
Analog inputs
3
2
250Vac 1A / 30Vdc 1A.
Relay outputs Important
Information on page 17.
2
1
Max 30Vdc, 500mA. Indicate module status,
communication failure and local setpoint status.
Status outputs on page 18.
4-20mA with over-range and under-range.
0-10mA with over-range.
Analog input on page 18.
+24V Loop supply 1
Provides power for 1 external current loop
(up to 35mA).
Installing the power supply
on page 14.
Analog setpoint
1
1
1
2
Allows discrete setpoint to be controlled from
analog input. Threshold adjustable via
rotary switch.
Refer to the User Manual.
Thermocouple /
millivolt input
Provides measurement of E, J, K, T type
Thermocouple, millivolt signals and user-defined on page 20.
thermocouple types.
Thermocouple input
Thermocouple
Setpoint
Lets you control discrete setpoint from
thermocouple with threshold adjustable via
rotary switch.
Refer to the User Manual.
Pulse inputs
Up to 10Hz.
Pulse input on page 21.
Analog Output
1
0-22mA, suitable for loop powered, floating
input or single-ended input device.
Analog output
on page 22.
For more information, see the next sections.
Digital Inputs
The BU-905U-L-T module provides two digital inputs suitable for:
• Voltage free contacts – e.g., mechanical switches; or
• NPN Transistor devices – e.g., electronic proximity switches; or
• 0-5V Signals - 2V – 4V Minimum range.
Note: PNP Transistor devices are not suitable.
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The unit provides contact wetting current of approximately 5mA to maintain reliable operation of driving relays.
Each digital input is connected between the appropriate Digital Input terminal and Ground.
Each digital input circuit includes a LED indicator that lights when the digital input is active (i.e., when the input circuit is closed).
To activate the digital input, the switching device resistance must be less than 200 ohms.
Connection Method
Example
Voltage free contact
Active 0-5v signal device
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Relay Outputs
The BU-905U-L-R module provides three normally open voltage-free relay contacts rated at 250Vac / 30Vdc 1A.
You can use these outputs to directly control low-powered equipment or power larger relays for higher-powered equipment.
For inductive loads, Cooper Bussmann recommends:
DC relays - use flyback diodes across the external circuit to prevent arcing across the relay contacts.
AC relays – use capacitors (e.g., 10nf 250V) to prevent arcing across the relay contacts.
You can individually configure digital outputs to turn off if no command message is received by the output for a certain period. This feature
provides an intelligent watchdog for each output, so communications failure at a transmitting site causes the output to revert to a known state.
The output circuit is connected to the appropriate pair of Digital Output terminals. Each digital output circuit includes a LED indicator that lights
when the digital output is active. The LED flashes if the watchdog alarm is active.
IMPORTANT SAFETY INFORMATION
In order to comply with Electrical Safety Standards, when connecting SELV AND voltages which are greater than SELV (30Vac or 60Vdc)
together, then Relay Output 2 must NOT be used in order to provide sufficient isolation between the outputs
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Status Outputs
The unit contains the following status outputs:
• System OK;
• Setpoint Output; and
• Communications Failure.
Status outputs are FET output to common rated at 30Vdc 500mA.
Connect the output circuit to the appropriate Status Output terminal. Each status output circuit is associated with an LED indicator that lights lit
when the digital output is active.
The following table details the status output behavior:
Status Output
LED
OK
LED Status
Green
Description
System OK active (both modules)
System OK inactive
No fault detected
OK
Red
• Internal fault detected.
• Supply voltage Low
• Analog Loop supply overloaded
Setpoint Output (BU-905U-L-T)
SP
CF
Green
Red
Local setpoint attached to 4-20mA analog input.
Communications Failure (BU-905U-L-R)
Watchdog alarms active on digital outputs or analog outputs.
Analog Input
The BU-905U-L-T module provides one 0-20mA DC analog input for connecting to instrument transducers (e.g. level, moisture, pressure
transducers, etc.).
Note: The BU-905U-L-T module inputs measure down to 0mA and can also be used for zero based signals (e.g., 0-10mA).
The analog input has a positive and negative terminal and can be placed at any point in the current loop, providing neither input rises above the
24 volt Analog Loop Supply level.
Each input has a loop resistance of less than 250 ohms and zener diode protection is provided against over-voltage and reverse voltage.
Note: You may require additional protection in high voltage or noisy environments or for long wiring runs.
A 24Vdc loop supply is available on the BU-905U-L-T module for powering the analog transducer loops. In this situation, connect the:
• Analog loop - between an Analog Input (-) terminal and Ground.
• Positive terminal – i.e., Analog Input (+) to the +24V Analog Loop Supply.
Externally powered loops may be connected by connecting the input between "Analog Input (+)" and “Analog Input (-)” Common mode voltage
may be -0.5V to 27V.
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Cooper Bussmann recommends using shielded cable for analog I/O loops to minimize induced noise and Radio Frequency Interference (RFI).
Note: You should only connect one end of the cable shield to Earth
To connect an analog signal from a PLC or DCS output to an analog input on the BU-905U-L-T, you must carefully check the internal circuit of the
output as different devices use different ways to create an analog signal.
The following diagrams illustrate different connection methods:
Analog Signal Source
Example
2-Wire Transducer
4-Wire Transducer
Current Source Output
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Example
Analog Signal Source
Current sink output
Thermocouple Input
The BU-905U-L-T provides one input suitable for connection to a thermocouple or a millivolt level signal. The module provides linearization tables
for J, K and T type thermocouples and also supports other types via a user linearization table.
Millivolt signals in the range -10mV to +100mV are supported.
For more information on configuring the thermocouple input and cold-junction compensation to suit your application, refer to the User Manual.
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Pulse Input
The BU-905U-L-T module lets you configure the digital inputs as pulse inputs with the following characteristics:
Characteristic
Value
Maximum rate
10Hz
Minimum OFF time
Minimum ON time
20mSec
20mSec
Note: You should connect the pulse input in the same way as a digital input.
The following diagrams illustrate different connection methods:
Connection method
Example
Passive transistor
Active pulse device
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Analog Output
The BU-905U-L-R module provides a 4 - 20mA DC analog output for connecting to instrument indicators to display remote analog measurements.
The analog output is a current source provided from an internally generated +24V loop supply.
When connecting to an external device (e.g. electronic indicator, recorder, PLC / DCS input, etc.) by connecting the output between the Analog
Output terminal (+) and the COM terminal (-).
Note: Zener protection of analog outputs provides protection against short periods of over-voltage; however longer periods may result
in module damage.
You can also individually configure analog outputs to turn off (i.e., 0mA) if no command message is received to the output for a certain period.
The following diagrams illustrate different connection methods:
Connection Method
Example
Loop powered device
Floating input device
To single-ended input device
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INSTALLING AND CONFIGURING THE UNIT
This section describes how to install and configure your unit and contains the following sections:
Section
Description
For more information, see …
Installing the unit on page 23.
Configuring your units on page 24.
Testing your units on page 25.
Installing the unit
Configuring your unit
Testing your unit
Describes how to physically install your unit.
Describes the different ways to configure your unit.
Describes the Bussmann recommendations for testing your unit.
For more information, see the next sections.
Installing the Unit
To install the unit:
1. Connect signals to the supplied terminals.
2. Connect the radio antenna.
3. Install DIN rail to mount the module.
4. Clip the module to the DIN rail:
You can now configure your unit. For more information, Configuring your units on page 24.
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Configuring Your Units
You can configure your network using:
• Default factory configuration – that lets you easily setup your network as a simple send/receive; or
• User-defined customized configuration – that lets you set specific information about your network and allows communication with other
Cooper Bussmann BU-905U-L Series devices.
For more information on setting a user-defined customized configuration, see the User Manual.
For more information on setting the factory default configuration, refer to the Quick Start Guide included with your module.
The following table details the factory default configuration:
Signals Sent Over Radio
BU-905U-L-T (Transmitter)
Digital Input 1
Sends
ꢀ
BU-905U-L-R (Receiver)
Digital Output 1
Digital Input 2
ꢀ
Digital Output 2
Analog Setpoint
ꢀ
Digital Output 3
Analog input (4-20mA)
ꢀ
Analog output
Other Signals
BU-905U-L-T (Transmitter)
Thermocouple Input (Not used)
Setpoint Output (Local indication)
System OK (On if system OK)
BU-905U-L-R (Receiver)
Communication Failure (Comes on if no messages from BU-905U-LT)
Communication Failure (Comes on if no messages from BU-905U-LT)
System OK (On if system OK)
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Testing Your Units
We recommend you bench test the complete system before installing a new system.
Configuration problems are easier to identify and fix when the units are next to each other.
The following table describes common problems and recommended solutions:
If your installation has …
You should check …
Cooper Bussmann recommends …
Poor radio channel
communications
• TX LED flashes but no RX LED • The radio path is adequate.
• Output LEDs flash quickly
• The antenna installation.
• For radio interference on the same channel.
• Higher performance antennas if the path is too long.
• Higher mounting points to overcome obstructions.
• Using an intermediate unit as a repeater.
Red OK LED
• Power Supply voltage
• Analog loop supply current
• Module configuration
• Supply should be between 9 and 30Vdc.
• The analog loop supply is rated for 35mA max.
• Your module configuration may be invalid. Re-load
or restore factory default configuration.
TX LED flashes but no RX LED
(bench testing)
• Ensure the BU-905U-L-R is set to the same
country and frequency band as the
BU-905U-L-T
• Register the receiver with the transmitter.
(Refer to the Quick Start Guide)
RX LED Flashes but no
outputs change
• For a user-defined customized configuration, • Check the configuration and reprogram
- check the configuration. the modules.
• For default configuration, check the receiver is • Repeat the procedure to register the
registered with the transmitter. receiver with the transmitter.
For support for other testing issues, please contact Cooper Bussmann.
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UNIT SPECIFICATIONS
This section details the specifications for each unit.
Transmitter Unit
Input/output
Number
Additional information
Digital Inputs
2
Dry-contact digital inputs slow-pulsed at 10Hz.
All inputs are suitable for voltage free contacts (e.g. mechanical switches) or
NPN transistor devices (e.g. electronic proximity switches).
NOTE: PNP transistor device inputs are NOT suitable.
Status Outputs
2
1
1
Separate System OK and Setpoint Status
Analog Inputs
0-20mA differential input; 16-bit resolution, 0.1% accuracy, 10 ohm input impedance.
Thermocouple Inputs
J, K or T Type thermocouple with on-board cold-junction compensation.
Cold junction compensation accuracy 1º over ambient temp range: -40º to +70ºC.
Power Supply
1
9-30Vdc 0.6 Amp CSA certified Class 2 power supply. For use in Class I Div 2 hazardous
locations, the power supply must be approved for Class 1 Div 2 use.
WARNING: Explosion hazard - do not disconnect while circuit is live unless area is
known to be non-hazardous.
Transmitter
Frequency
1
1-Watt Frequency Hopping Spread Spectrum (FHSS) Transmitter.
902-928 MHz Actual frequency range depends on country.
Receiver Unit
Input/output
Digital outputs
Status outputs
Analog output
Power supply
Number
Additional information
3
2
1
1
Voltage-free contacts rated at 250Vac, 1A, 30Vdc 1A 2 for digital inputs and 1 for setpoint.
Separate System OK and communication failure output.
16-bit resolution, 0.1% accuracy, single-ended source output.
9-30Vdc 0.25 Amp CSA certified Class 2 power supply. For use in Class I Div 2 Hazardous
locations, the power supply must be approved for Class 1 Div 2 use.
WARNING: Explosion hazard - do not disconnect while circuit is live unless area is
known to be non-hazardous.
Radio receiver
Frequency
1
High sensitivity FHSS UHF radio receiver.
902-928 MHz Actual frequency range depends on country.
Sensitivity
-110 dBm
At PER 8%.
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Ancillary Hardware Reference Information
This section contains reference information about additional hardware components you may need for your unit.
RS232 Serial Cable
You can connect the unit to a PC using an RS232 serial cable to:
• Transfer configuration information;
• Perform factory and field-testing.
The serial port is an 8 pin RJ45 plug that communicates using standard RS232 signals:
Signal information
Baud rate
Bits
Value
9600
8 bits with 1 stop bit
No parity
Parity
Cooper Bussmann supplies a green configuration cable wired to the following pin-out:
Note: The following pin-out information is for reference only.
RJ45
Required
Signal Name
Normal Color
Green / White
Green
DB9
9
1
2
3
4
5
6
7
8
Ring Indicator
Data Carrier Detect
Data Terminal Ready
Signal Common
1
Y
Y
Y
Y
Orange / White
Blue
4
5
Receive Data (from Modem)
Transmit Data (to Modem)
Clear to Send
Blue / White
Orange
2
3
Brown / White
Brown
8
Request to Send
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INDEX
2-Wire transducer . . . . . . . . . . . . . . . .19
4-Wire transducer . . . . . . . . . . . . . . . .19
AC relays . . . . . . . . . . . . . . . . . . . . . .17
interference . . . . . . . . . . . . . . . . . . . . .10
internal surge protection . . . . . . . . . . .14
LEDs
setpoint
thermocouple . . . . . . . . . . . . . . . . .15
setpoint levels . . . . . . . . . . . . . . . . . . . .6
SG900-6 . . . . . . . . . . . . . . . . . . . . . . . .9
SG900EL . . . . . . . . . . . . . . . . . . . . . . .9
shielding . . . . . . . . . . . . . . . . . . . . . . .11
signals . . . . . . . . . . . . . . . . . . . . . . . .24
single-ended input device . . . . . . . . . .22
SMA connector . . . . . . . . . . . . . . . . . .11
solutions . . . . . . . . . . . . . . . . . . . . . . .25
specifications . . . . . . . . . . . . . . . . . . .26
status outputs . . . . . . . . . . . . . . . . . . .18
surge diverter . . . . . . . . . . . . . . . . . . .11
surge protection . . . . . . . . . . . . . . . . .11
surge suppression . . . . . . . . . . . . . . . .11
switches
active pulse device
See active signal device . . . . . . . . . . . .15
receiver . . . . . . . . . . . . . . . . . . . . . . .8
transmitter . . . . . . . . . . . . . . . . . . . . .6
lightening rod . . . . . . . . . . . . . . . . . . .11
lightening strike . . . . . . . . . . . . . . . . . .11
line of sight . . . . . . . . . . . . . . . . . . . . .10
linearization tables . . . . . . . . . . . . . . . .20
loop powered device . . . . . . . . . . . . . .22
maximum transmission distance . . . . . .10
mechanical switches . . . . . . . . . . . . . .15
millivolt signal . . . . . . . . . . . . . . . . . . .20
net gain . . . . . . . . . . . . . . . . . . . . . . . .9
obstructions . . . . . . . . . . . . . . . . . . . .10
intermediate . . . . . . . . . . . . . . . . . .10
overvoltage . . . . . . . . . . . . . . . . . . . . .18
passive transistor . . . . . . . . . . . . . . . .21
pin-out . . . . . . . . . . . . . . . . . . . . . . . .27
PLC . . . . . . . . . . . . . . . . . . . . . . . . . .18
polarization . . . . . . . . . . . . . . . . . . . . .13
polarized . . . . . . . . . . . . . . . . . . . . . . .13
power supply . . . . . . . . . . . . . . . . . . . .14
installing . . . . . . . . . . . . . . . . . . . . .14
problems . . . . . . . . . . . . . . . . . . . . . . .25
pulse input . . . . . . . . . . . . . . . . . . . . .21
PVC tape . . . . . . . . . . . . . . . . . . . . . . .11
Radio Frequency Interference . . . . . . . .18
receiver
analog input . . . . . . . . . . . . . . . . . . . .18
analog output . . . . . . . . . . . . . . . . . . .22
antennas . . . . . . . . . . . . . . . . . . . . . . .11
compatible cables . . . . . . . . . . . . . . .9
dipole . . . . . . . . . . . . . . . . . . . . . . .11
installing . . . . . . . . . . . . . . . . . . . . . .9
polarization . . . . . . . . . . . . . . . . . . .13
supported antennas . . . . . . . . . . . . . .9
arcing . . . . . . . . . . . . . . . . . . . . . . . . .17
bench testing . . . . . . . . . . . . . . . . . . .25
cable
loss . . . . . . . . . . . . . . . . . . . . . . . . . .9
cables
electronic proximity . . . . . . . . . . . . .15
switches
for antennas . . . . . . . . . . . . . . . . . . .9
supported cables . . . . . . . . . . . . . . . .9
CFD890EL . . . . . . . . . . . . . . . . . . . . . .9
coaxial surge diverter . . . . . . . . . . . . . .11
configuration
mechanical . . . . . . . . . . . . . . . . . . .15
taping connections . . . . . . . . . . . . . . .11
testing . . . . . . . . . . . . . . . . . . . . . . . .25
thermocouple . . . . . . . . . . . . . . . . . . .20
thermocouple setpoint . . . . . . . . . . . . .15
transducers . . . . . . . . . . . . . . . . . . . . .18
transmitter
default factory . . . . . . . . . . . . . . . . .24
user-defined customized . . . . . . . . .24
configuring . . . . . . . . . . . . . . . . . . . . .24
connections
components . . . . . . . . . . . . . . . . . . .5
front panel . . . . . . . . . . . . . . . . . . . . .6
terminal connections . . . . . . . . . . . . .5
UV-stabilized tape . . . . . . . . . . . . . . . .11
vertical polarization . . . . . . . . . . . . . . .13
voltage free contact . . . . . . . . . . . . . . .15
Vulcanizing tape . . . . . . . . . . . . . . . . .11
watchdog alarm . . . . . . . . . . . . . . . . . .17
WH900 . . . . . . . . . . . . . . . . . . . . . . . . .9
YU16/900 . . . . . . . . . . . . . . . . . . . . . . .9
YU6/900 . . . . . . . . . . . . . . . . . . . . . . . .9
zener diode protection . . . . . . . . . . . . .18
zero based signals . . . . . . . . . . . . . . . .18
taping . . . . . . . . . . . . . . . . . . . . . . .11
current sink output . . . . . . . . . . . . . . .20
current source output . . . . . . . . . . . . .19
DC relays . . . . . . . . . . . . . . . . . . . . . .17
DCS . . . . . . . . . . . . . . . . . . . . . . . . . .18
digital inputs . . . . . . . . . . . . . . . . . . . .15
DIN rail . . . . . . . . . . . . . . . . . . . . . . . .23
dipole antennas . . . . . . . . . . . . . . . . . .11
electronic proximity switches . . . . . . . .15
explosive areas . . . . . . . . . . . . . . . . . .14
floating input device . . . . . . . . . . . . . . .22
flyback diodes . . . . . . . . . . . . . . . . . . .17
gain
components . . . . . . . . . . . . . . . . . . .7
front panel . . . . . . . . . . . . . . . . . . . . .8
LEDs . . . . . . . . . . . . . . . . . . . . . . . . .8
terminal connections . . . . . . . . . . . . . . .7
relay outputs . . . . . . . . . . . . . . . . . . . .17
reliable path . . . . . . . . . . . . . . . . . . . .10
repeater . . . . . . . . . . . . . . . . . . . . . . .10
reverse voltage . . . . . . . . . . . . . . . . . .18
RFI . . . . . . . . . . . . . . . . . . . . . . . . . . .18
RJ45 . . . . . . . . . . . . . . . . . . . . . . . . .27
rotary switch . . . . . . . . . . . . . . . . . . . . .6
changing position . . . . . . . . . . . . . . .6
setpoint levels . . . . . . . . . . . . . . . . . .6
RS232 . . . . . . . . . . . . . . . . . . . . . . . .27
serial cable . . . . . . . . . . . . . . . . . . . . .27
net gain . . . . . . . . . . . . . . . . . . . . . . .9
horizontal polarization . . . . . . . . . . . . .13
installing . . . . . . . . . . . . . . . . . . . . . . .23
instrument transducers . . . . . . . . . . . .18
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Notes:
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Customer Assistance
Customer Satisfaction Team
Application Engineering
Available to answer questions regarding Cooper
Bussmann products & services Monday-Friday,
8:00 a.m. – 4:30 p.m. for all US time zones.
Contact:
Technical assistance is available to all customers.
Staffed by degreed engineers, this application support
is available Monday-Friday, 8:00 a.m. – 5:00 p.m. CT
Contact:
s Toll-free phone: 855-287-7626 (855-BUSSMANN)
s Toll-free fax: 800-544-2570
s E-mail: [email protected]
s Phone: 636-527-1270
s Fax: 636-527-1607
s E-mail: [email protected]
Emergency and After-Hours Orders
Online Resources
resources:
Next flight out or will call shipment for time-critical needs.
Customers pay only standard product price, rush freight
charges, & modest emergency service fee. Place these
orders through the Customer Satisfaction Team during
regular business hours. For after-hours, contact:
s Product search & cross-reference
s Product & technical materials
s Solutions centers for information on topical issues
including arc-flash, selective coordination &
short-circuit current rating
s Technical tools, like our arc-flash calculator
s Where to purchase Cooper Bussmann product
s Phone: 314-995-1342
3
C
– the Enhanced, Online Cooper Customer Center
Provides real time product availability, net pricing, order
status & shipment tracking across six Cooper divisions:
B-line, Bussmann, Crouse-Hinds, Lighting, Power
Systems & Wiring Devices. Available at:
Services
Cooper Bussmann Services team provides engineering
expertise in electrical system reviews, electrical safety
training & component testing for Agency compliance.
Contact:
s 877-995-5955 for log-in assistance
s Phone: 636-207-3294
s E-mail: [email protected]
Cooper Bussmann
St. Louis, MO 63178
855.287.7626 (855-BUSSMANN)
Your Authorized Cooper Bussmann Distributor is:
©2011 Cooper Bussmann
PDF Only
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